CN216351372U - Optical fiber limiting device and optical module - Google Patents

Abstract

The application discloses optical fiber limiting device and optical module relates to the technical field of optical modules and is used for solving the problem that an optical fiber in the optical module is easy to interfere with an optical fiber inscription device or a lens group to cause damage and fracture. The optical fiber limiting device is used for limiting the path of an optical fiber in an optical module and comprises a connecting bottom surface and a side limiting area, wherein the connecting bottom surface can be fixedly connected to a circuit board in the optical module; one end of the side limiting area is connected with the connecting bottom surface, and the side limiting area is used for limiting or changing the path of the optical fiber in the optical module so as to avoid devices on the circuit board. The present application is directed to limiting or altering the path of an optical fiber within the optical module.

Description

Optical fiber limiting device and optical module

Technical Field

The application relates to the technical field of optical modules, in particular to an optical fiber limiting device and an optical module adopting the same.

Background

The optical module is composed of a photoelectronic device, a functional circuit, an optical interface and the like, wherein the photoelectronic device comprises a transmitting part and a receiving part. In brief, the optical module functions in that a transmitting end converts an electrical signal into an optical signal to transmit the optical signal, and a receiving end converts a received optical signal into an electrical signal. The optoelectronic devices are generally a laser chip and a photodetector chip, and optical signals can be transmitted and processed between the optical interfaces by using discrete optical components, such as a wavelength division multiplexer and a lens, or optical signals can be transmitted between the laser chip and the photodetector chip and between the optical interfaces by using optical fibers.

An optical module in the prior art includes a cover plate and a base 05, a mounting space is formed in the base 05, and a circuit board 01 is fixed in the mounting space. In configurations where optical fibers are used in the optical module to transmit the optical signal, the laser chip and the photodetector chip are typically mounted on the circuit board 01 and the optical signal is coupled into the optical fiber or into the photodetector chip through a lens assembly. In particular, in a multi-channel optical module, a plurality of optical fibers are mounted on a circuit board 01 via an optical fiber interconnection device to couple with a lens assembly, as shown in fig. 1.

However, as the number of channels of the optical module increases, the space in the optical module is limited, and the optoelectronic chips of each channel may need to be staggered back and forth on the circuit board 01 along the axial direction. A second optical fiber 022 coupled to an optochip at the distal end (relatively far from optical port 04) may straddle over and interfere with a proximal optical fiber inscription device 031 or lens group of a first optical fiber 021 coupled to an optochip at the proximal end (relatively close to optical port 04 with respect to another group of optochips), where second optical fiber 022 is coupled to a distal optical fiber inscription device 032, as shown in fig. 1. Because the installation space is limited, that is, the height of the installation space (that is, the distance between the base 05 and the cover plate) is limited, the gap between the cover plate and the proximal end optical fiber inscription device 031 or the lens group is extremely small, so when a worker installs the cover plate, the cover plate can press the second optical fiber 022 located above the proximal end optical fiber inscription device 031 or the lens group, which causes damage to the second optical fiber 022, and even breaks during later transportation and use, which causes problems such as failure of the optical module.

SUMMERY OF THE UTILITY MODEL

The optical fiber limiting device and the optical module provided by the embodiment of the application are used for solving the problem that an optical fiber in the optical module is easy to interfere with an optical fiber inscription device or a lens group to cause damage and fracture.

In order to achieve the above object, the optical fiber limiting device provided by the present application is used for limiting a path of an optical fiber in an optical module, and the optical fiber limiting device includes a connection bottom surface and a side limiting area, wherein the connection bottom surface is fixedly connected to a circuit board in the optical module; one end of the side limiting area is connected with the connecting bottom surface, and the side limiting area is used for limiting or changing the path of the optical fiber in the optical module so as to avoid devices on the circuit board.

In some embodiments of the present application, the optical fiber stop device further comprises a top stop region connected to an end of the side stop region away from the connection bottom surface for blocking the optical fiber from passing over the top of the optical fiber stop device.

In some embodiments of the present application, the angle between the top confinement region and the side confinement region is less than or equal to 90 °.

In some embodiments of the present application, the optical fiber limiting device is a U-shaped limiting device, a C-shaped limiting device or an inverted L-shaped limiting device surrounded by the connecting bottom surface, the top limiting region and the side limiting regions.

In some embodiments of the present application, an opening of the U-shaped limiting device, the C-shaped limiting device, or the inverted L-shaped limiting device faces away from a device to be avoided on the circuit board.

In some embodiments of the present application, the angle between the top confinement region and the side confinement region is greater than 90 °.

In some embodiments of the present application, a gap between the top stop region and the cover plate within the optical module is less than an outer diameter of the optical fiber.

In some embodiments of the present application, the top confinement region and the side confinement region are cylinders extending in the same direction.

In some embodiments of the present application, the top limiting region and the side limiting region form an elastic member having a through groove for surrounding, a width of the through groove is greater than or equal to an outer diameter of the optical fiber, an opening width of the through groove is smaller than the outer diameter of the optical fiber, and the optical fiber is inserted into the through groove.

In some embodiments of the present application, the connection bottom surface is a soldering surface or an adhesive-backed surface.

On the other hand, the application also provides an optical module, which comprises a shell, wherein an electric port and an optical port are respectively formed at two ends of the shell, and the shell comprises an installation space formed by covering a base and a cover plate; a circuit board, a photoelectric chip, an optical fiber and a lens group are arranged in the mounting space; one end of the circuit board extends out of the electric port and is used for being electrically connected with the outside; the photoelectric chip is arranged on the circuit board; the optical fibers comprise a plurality of optical fibers, and connecting ends and coupling ends which are respectively arranged at two ends of the optical fibers, wherein the connecting ends are provided with optical fiber external devices which are arranged at the optical ports and used for being connected with external optical fibers; the lens group is butted with the coupling end and is used for optical coupling between the photoelectric chip and the optical fiber; and the optical fiber limiting device is arranged on the circuit board and used for limiting or changing the path of the optical fiber so as to avoid devices on the circuit board.

In some embodiments of the present application, the optoelectronic chips are at least two: the first photoelectric chip and the second photoelectric chip respectively correspond to at least two groups of optical fibers: a first optical fiber and a second optical fiber, and at least two sets of lens groups: a first lens group and a second lens group; the first optical fiber is provided with a first coupling end, the second optical fiber is provided with a second coupling end, and the first coupling end and the first lens group butted with the first coupling end are far away from the optical port compared with the second coupling end and the second lens group; the optical fiber limiting device is close to the second coupling end or the second lens group and used for limiting or changing the path of the first optical fiber so as to avoid the second coupling end and/or the second lens group.

Compared with the prior art, the optical fiber limiting device is installed on the circuit board of the optical module through the connecting bottom surface, meanwhile, the optical fiber limiting device is provided with the side limiting area which is connected with the connecting bottom surface and used for limiting or changing the path of the optical fiber in the optical module so as to avoid other components arranged on the circuit board, such as an optical fiber inscription device and a lens group of a coupling end of other optical fiber groups, and the like, so that the optical fiber is prevented from crossing over the adjacent lens group or the optical fiber inscription device of the coupling end of the optical fiber and being damaged by the cover plate of the optical module, and the reliability of the optical module is effectively improved.

In addition, because the optical fiber limiting device in the optical module provided by the application and the optical fiber limiting device adopt the same structure, the optical fiber limiting device and the optical fiber limiting device can solve the same technical problem and achieve the same expected effect.

Drawings

Fig. 1 is a schematic perspective view of a light module without a cover plate in the prior art;

fig. 2 is a schematic perspective view of an optical module without a cover plate in the embodiment of the present application;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a schematic plan view of the optical module shown in fig. 2, illustrating a position of the optical fiber limiting device in the optical module when the optical fiber limiting device is a U-shaped limiting device in the embodiment of the present application;

fig. 5 is a schematic plan view illustrating another layout of an optical module according to an embodiment of the present disclosure, so as to show a position of an optical fiber limiting device in the optical module when the optical fiber limiting device is a limiting post.

The main reference numbers in the drawings accompanying the present specification are as follows:

1-a circuit board; 2-an optical fiber; 21-a first optical fiber; 22-a second optical fiber; 3-optical fiber inscription device; 31-a first optical fiber inscription device, 32-a second optical fiber inscription device; 4-optical fiber limiting device; 41-connecting the bottom surface; 42-lateral confinement region; 43-a top confinement region; 44-a limit post; 5-a base; 51-an optical port; 52-electrical port.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

Referring to fig. 2 to 4, the optical fiber limiting device 4 provided in the present application is used for limiting or changing the path of an optical fiber in an optical module. In this embodiment, the optical fiber limiting device 4 includes a connection bottom surface 41 and a side limiting region 42, and the connection bottom surface 41 can be fixedly connected to the circuit board 1 in the optical module; one end of the side limiting region 42 is connected to the bottom connection surface 41, and the side limiting region 42 is used to limit or change the path of the optical fiber 2 in the optical module to avoid the devices on the circuit board 1.

Compared with the prior art, the optical fiber limiting device 4 of the present application mounts the optical fiber limiting device 4 on the circuit board 1 of the optical module through the connecting bottom surface 41, and meanwhile, because the optical fiber limiting device 4 has the side limiting region 42, the side limiting region 42 is connected with the connecting bottom surface 41 and is used for limiting or changing the path of the optical fiber 2 in the optical module to avoid other components arranged on the circuit board 1, such as the optical fiber inscribing device 3 and the lens group of the coupling end of other optical fiber groups, and the like, the optical fiber 2 (i.e., the first optical fiber 21) is prevented from being damaged by the cover plate of the optical module when crossing over the adjacent lens group or the optical fiber inscribing device 3 (i.e., the second optical fiber inscribing device 32) of the coupling end of the adjacent optical fiber (i.e., the second optical fiber 22), and the reliability of the optical module is effectively improved. Here, the optical fiber interconnection device 3 is, for example, a multi-core optical fiber connector.

When there is only one optical fiber, the optical fiber interconnection device 3 has one, for example, the first optical fiber interconnection device 31, and the side limiting region 42 is used to limit the bending of the coupling end of the optical fiber 2 (i.e., the first optical fiber 21), so as to prevent the joint between the coupling end of the first optical fiber 21 and the first optical fiber interconnection device 31 from being pulled due to the bending of the coupling end of the first optical fiber 21, thereby ensuring the reliable connection between the first optical fiber 21 and the first optical fiber interconnection device 31, and improving the reliability of the optical module.

When there are multiple optical fibers, the optical fiber interconnection device 3 has multiple optical fibers, such as the first optical fiber interconnection device 31 and the second optical fiber interconnection device 32, the side limiting region 42 can be used to limit the bending of the coupling end of the optical fiber 2 (i.e. the first optical fiber 21), and can also change the path of the optical fiber 2 (i.e. the first optical fiber 21), so as to prevent the first optical fiber 21 from straddling over the second optical fiber interconnection device 32 or the lens group and being pressed and damaged by the optical module cover plate, thereby effectively improving the reliability of the optical module.

With reference to fig. 3, the optical fiber limiting device 4 further includes a top limiting region 43, the top limiting region 43 is connected to one end of the side limiting region 42 away from the connection bottom surface 41, and is used to block the optical fiber 2 from crossing over the top of the optical fiber limiting device 4, so as to prevent the optical fiber 2 (i.e. the first optical fiber 21) from crossing over the top of the optical fiber limiting device 4 and then straddling over the second optical fiber interconnection device 32 or the lens group to be damaged by the optical module cover plate, thereby further improving the reliability of the optical module.

It should be noted that, the connection of one end of the side limiting region 42 with the connection bottom surface 41 may be understood as the connection of the bottom end of the side limiting region 42 with the connection bottom surface 41, and the connection of the top limiting region 43 with one end of the side limiting region 42 away from the connection bottom surface 41 may be understood as the connection of the top end of the side limiting region 42 with the top limiting region 43, that is, the top limiting region 43 and the connection bottom surface 41 are disposed oppositely.

In order to improve the retention of the optical fiber 2 (i.e. the first optical fiber 21) by the top retention area 43, i.e. to better prevent the first optical fiber 21 from passing over the top of the optical fiber retention device 4, the angle between the top retention area 43 and the side retention area 42 is smaller than or equal to 90 °.

Based on the above embodiment, the optical fiber limiting device 4 is a U-shaped limiting device (as shown in fig. 3), a C-shaped limiting device or an inverted L-shaped limiting device, which is formed by enclosing the connection bottom surface 41, the top limiting region 43 and the side limiting region 42, and the optical fiber limiting device 4 with the above structure has a simpler structure and is easy to implement.

The connecting bottom surface 41 and the top limiting area 43 in the U-shaped limiting device are both in a horizontal strip shape, and the side limiting area 42 is in a vertical short strip shape. That is, the bottom connecting surface 41 and the top limiting region 43 are parallel to each other, and the side limiting region 42 vertically connects the bottom connecting surface 41 and the top limiting region 43. Or, the optical fiber limiting device 4 is a U-shaped metal clip welded to the circuit board 1.

In some embodiments of the present application, an opening of the U-shaped limiting device, the C-shaped limiting device, or the inverted L-shaped limiting device faces away from a device to be avoided on the circuit board 1, so that the optical fiber 2 (i.e., the first optical fiber 21) whose path needs to be limited enters the U-shaped limiting device, the C-shaped limiting device, or the inverted L-shaped limiting device from the opening, and the optical fiber 2 (i.e., the first optical fiber 21) can be prevented from being pulled out from the opening and then straddling over the second optical fiber interconnection device 32 or the lens group and being damaged by the cover plate of the optical module.

Or, the optical fiber position limiting device 4 is a V-shaped position limiting device, wherein one side of the V-shaped position limiting device is connected to the circuit board 1, the other side of the V-shaped position limiting device extends toward the optical fiber 2 (i.e., the first optical fiber 21), and an opening of the V-shaped position limiting device faces away from a device to be avoided on the circuit board 1.

In other embodiments of the present application, the angle between the top confinement region and the side confinement region is greater than 90 °.

Based on the above embodiment, in the optical module, the gap between the top stop region 43 and the cover plate is smaller than the outer diameter of the optical fiber 2 (i.e., the first optical fiber 21), and the optical fiber 2 (i.e., the first optical fiber 21) is prevented from passing over the top of the optical fiber stop 4 from the gap.

It will be appreciated that the gap between the top stop region 43 and the cover plate is smaller than the outer diameter of the optical fiber 2 (i.e., the first optical fiber 21) including the top stop region 43 engaging the cover plate.

Based on the above embodiment, the top limiting region 43 and the side limiting region 42 are cylinders extending along the same direction, that is, the included angle between the top limiting region 43 and the side limiting region 42 is 180 °, that is, the optical fiber limiting device 4 is the limiting column 44, the top limiting region 43 is the upper end of the limiting column 44, and the optical fiber 2 (i.e., the first optical fiber 21) is prevented from crossing the top of the optical fiber limiting device 4 by controlling the distance between the end surface of the upper end of the limiting column 44 and the cover plate.

Or, optic fibre stop device 4 still includes the spliced pole, and the spliced pole is fixed on the lower surface of apron, and towards circuit board 1 extends, a connecting hole has been seted up on the spliced pole, be close to on the spacing post 44 the one end of apron stretches into in the connecting hole, better avoid optic fibre 2 (being first optic fibre 21) follow from the top of spacing post 44 is crossed from this.

The positions of the limiting columns 44 and the connecting columns can be exchanged, namely the limiting columns 44 can be arranged on the cover plate, and the connecting columns can be arranged on the circuit board 1.

In other embodiments, the optical fiber limiting device 4 is a limiting plate, the limiting plate is fixed on the circuit board 1, an extending direction of the limiting plate is the same as a propagation direction of light in the optical module (i.e., a left-right direction in fig. 5), and the limiting plate is in a long strip structure.

In some embodiments of the present application, the top limiting region 43 and the side limiting region 42 are configured to form an elastic member having a through groove, a width of the through groove is greater than or equal to an outer diameter of the optical fiber 2 (i.e., the first optical fiber 21), an opening width of the through groove is smaller than the outer diameter of the optical fiber 2 (i.e., the first optical fiber 21), and the optical fiber 2 (i.e., the first optical fiber 21) is inserted into the through groove, so as to better prevent the optical fiber 2 (i.e., the first optical fiber 21) from falling off from the through groove, thereby causing the limiting function of the optical fiber limiting device 4 to fail.

The connection bottom surface 41 is a soldering surface or a back-adhesive surface. When the connecting bottom Surface 41 is a soldering Surface, the connecting bottom Surface 41 can be soldered on the circuit board 1 by Surface Mount Technology (SMT), which facilitates manufacturing and simplifies the optical module assembly process. When the connection bottom surface 41 is an adhesive-backed surface, the connection bottom surface 41 is bonded to the circuit board 1 through an adhesive layer.

Referring to fig. 2 to 5, the present application further provides an optical module, which includes a housing, an electrical port 52 and an optical port 51 are formed at two ends of the housing respectively, and the housing includes an installation space formed by a base 5 and a cover plate; the circuit board 1, the photoelectric chip, the optical fiber 2 and the lens group are arranged in the mounting space; one end of the circuit board 1 extends out of the electric port 52 and is used for being electrically connected with the outside; the photoelectric chip is arranged on the circuit board 1; the optical fibers comprise a plurality of optical fibers, and connecting ends and coupling ends which are respectively arranged at two ends of the optical fibers, wherein the connecting ends are provided with optical fiber external devices which are arranged at the optical ports 51 and are used for being connected with external optical fibers; the lens group is butted with the coupling end and is used for optical coupling between the photoelectric chip and the optical fiber; and the optical fiber limiting device 4 is arranged on the circuit board 1, and the optical fiber limiting device 4 is used for limiting or changing the path of the optical fiber 2 so as to avoid devices on the circuit board 1.

Because the optical fiber limiting device 4 in the optical module provided by the application and the optical fiber limiting device 4 adopt the same structure, the same technical problem can be solved by the optical fiber limiting device and the optical fiber limiting device, and the same expected effect can be achieved.

It should be understood that the cover plate is detachably fixed to the base 5, thereby facilitating the maintenance operation of the inside of the optical module and the installation operation of the circuit board 1, the optoelectronic chip, the optical fiber 2, the lens assembly, and other components.

Wherein, the cover plate is fastened and connected with the base 5 through screw threads, or the cover plate is connected with the base 5 in a clamping manner through a clamping hook buckle.

Hereinafter, for convenience of description, the optical fiber positioning device 4 in the present application will be described in detail below with reference to at least two sets of optical fibers 2 including the first optical fiber 21 and the second optical fiber 22.

In some embodiments of the present application, the optoelectronic chips are at least two: first photoelectricity chip and second photoelectricity chip correspond at least two sets of optic fibre 2 respectively: a first optical fiber 21 and a second optical fiber 22, and at least two sets of lens groups: a first lens group and a second lens group; the first optical fiber 21 has a first coupling end, the second optical fiber 22 has a second coupling end, and the first coupling end and the first lens group connected with the first coupling end are far away from the optical port 51 compared with the second coupling end and the second lens group; the optical fiber limiting device 4 is close to the second coupling end or the second lens group and used for limiting or changing a path of the first optical fiber 21 so as to avoid the second coupling end and/or the second lens group, and the first optical fiber 21 is prevented from crossing over the second optical fiber inscription device 32 of the coupling end of the second lens group or the second optical fiber 22 and being damaged by the cover plate of the optical module, so that the reliability of the optical module is effectively improved.

Wherein a first coupling end of the first optical fiber 21 is connected with the first optical fiber inscription device 31 in the optical fiber inscription device 3, and a second coupling end of the second optical fiber 22 is connected with the second optical fiber inscription device 32 in the optical fiber inscription device 3.

In the optical module, the optical port 51 includes an emitting end optical port and a receiving end optical port, a gold finger is arranged at one end of the circuit board 1 extending out of the electrical port 52, the gold finger is electrically connected with an external upper computer, an electrical signal enters the circuit board 1 from the gold finger of the circuit board 1 and is then output to a first photoelectric chip, such as a laser chip, and the first photoelectric chip converts the electrical signal into an optical signal and outputs the optical signal to the receiving end optical port through the first lens group. The second optoelectronic chip may be a photodetector chip or another set of laser chips.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (12)

1. An optical fiber limiting device for limiting the path of an optical fiber within an optical module, the optical fiber limiting device comprising:

the connecting bottom surface can be fixedly connected to a circuit board in the optical module;

and one end of the side limiting area is connected with the connecting bottom surface, and the side limiting area is used for limiting or changing the path of the optical fiber in the optical module so as to avoid devices on the circuit board.

2. The optical fiber spacing device of claim 1, further comprising:

the top limiting area is connected with one end, far away from the connecting bottom surface, of the side limiting area and used for blocking the optical fiber from crossing the top of the optical fiber limiting device.

3. The optical fiber spacing device of claim 2, wherein the angle between said top spacing region and said side spacing region is less than or equal to 90 °.

4. The optical fiber spacing device of claim 3, wherein said optical fiber spacing device is a U-shaped spacing device, a C-shaped spacing device or an inverted L-shaped spacing device formed by enclosing said connection bottom surface, said top spacing region and said side spacing region.

5. The optical fiber spacing device of claim 4, wherein an opening of said U-shaped spacing device, said C-shaped spacing device or said inverted L-shaped spacing device faces away from a device on said circuit board to be avoided.

6. The optical fiber spacing device of claim 2, wherein the angle between said top spacing region and said side spacing region is greater than 90 °.

7. The fiber optic spacing device of claim 6, wherein a gap between said top spacing region and a cover plate in said optical module is less than an outer diameter of said optical fiber within said optical module.

8. The optical fiber spacing device of claim 7, wherein said top spacing region and said side spacing region are cylinders extending in the same direction.

9. The optical fiber limiting device according to claim 2, wherein the top limiting region and the side limiting region are configured to enclose an elastic member having a through groove, the width of the through groove is greater than or equal to the outer diameter of the optical fiber, the opening width of the through groove is smaller than the outer diameter of the optical fiber, and the optical fiber is inserted into the through groove.

10. An optical fibre spacing device as claimed in any of claims 1 to 9 wherein the connecting bottom surface is a solder or adhesive backed surface.

11. A light module, comprising:

the device comprises a shell, a light source and a light source, wherein an electric port and a light port are formed at two ends of the shell respectively, and the shell comprises an installation space formed by covering a base and a cover plate;

a circuit board, a photoelectric chip, an optical fiber and a lens group are arranged in the mounting space;

one end of the circuit board extends out of the electric port and is used for being electrically connected with the outside;

the photoelectric chip is arranged on the circuit board;

the optical fibers comprise a plurality of optical fibers, and connecting ends and coupling ends which are respectively arranged at two ends of the optical fibers, wherein the connecting ends are provided with optical fiber external devices which are arranged at the optical ports and used for being connected with external optical fibers;

the lens group is butted with the coupling end and is used for optical coupling between the photoelectric chip and the optical fiber; and

the optical fiber spacing device of any of claims 1-10, disposed on the circuit board, for limiting or altering a path of the optical fiber to avoid a device on the circuit board.

12. The light module of claim 11,

the photoelectric chips are at least two: the first photoelectric chip and the second photoelectric chip respectively correspond to at least two groups of optical fibers: a first optical fiber and a second optical fiber, and at least two sets of lens groups: a first lens group and a second lens group;

the first optical fiber is provided with a first coupling end, the second optical fiber is provided with a second coupling end, and the first coupling end and the first lens group butted with the first coupling end are far away from the optical port compared with the second coupling end and the second lens group;

the optical fiber limiting device is close to the second coupling end or the second lens group and used for limiting or changing the path of the first optical fiber so as to avoid the second coupling end and/or the second lens group.

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